Briley has been making S&W conversion barrels under contract for me since last year. The production rate is a bit slow, as Briley is in high demand for numerous projects, but the product is very good, with a high rate of customer satisfaction. We started with 9x19 drop in barrels for the S&W 356 TSW automatics (3566's and SD356) and have added the 357 SIG for Shorty Forty's among others. Over the course of many conversations with their subject matter expert, I am convinced he can make me nearly any S&W barrel upon request. Special orders can take awhile but if you have something you would like, let me know and I will try to set it up for you.